Problématique de terminologie botanique en français : l'exemple des fruits, noix et arbres fruitiers du Vanuatu (Vanouatou)

L'objectif est de fixer la terminologie en français des principales espèces fruitières du Vanuat

1/N expansion of the D3-D5 defect CFT at strong coupling

We consider four dimensional U(N) N = 4 SYM theory interacting with a 3d N = 4 theory living on a co dimension-one interface and holographically dual to the D3-D5 system without flux. Localization captures several observables in this dCFT, including its free energy, related to the defect expectation value, and single trace 1/2-BPS composite scalars. These quantities may be computed in a hermitian one-matrix model with non polynomial single-trace potential. We exploit the integrable Volterra hierarchy underlying the matrix model and systematically study its 1/N expansion at any value of the 't Hooft coupling. In particular, the strong coupling regime is determined - up to non-perturbative exponentially suppressed corrections - by differential relations that constrain higher order terms in the 1/N expansion. The analysis is extended to the model with SU(N) gauge symmetry by resorting to the more general Toda lattice equations

3D deformation field in growing plant roots reveals both mechanical and biological responses to axial mechanical forces

Strong regions and physical barriers in soils may slow root elongation, leading to reduced water and nutrient uptake and decreased yield. In this study, the biomechanical responses of roots to axial mechanical forces were assessed by combining 3D live imaging, kinematics and a novel mechanical sensor.[br/] This system quantified Young's elastic modulus of intact poplar roots (32 MPa), a rapid <0.2 mN touch-elongation sensitivity, and the critical elongation force applied by growing roots that resulted in bending. Kinematic analysis revealed a multiphase bio-mechanical response of elongation rate and curvature in 3D. Measured critical elongation force was accurately predicted from an Euler buckling model, indicating that no biologically mediated accommodation to mechanical forces influenced bending during this short period of time. Force applied by growing roots increased more than 15-fold when buckling was prevented by lateral bracing of the root. The junction between the growing and the mature zones was identified as a zone of mechanical weakness that seemed critical to the bending process.[br/] This work identified key limiting factors for root growth and buckling under mechanical constraints. The findings are relevant to crop and soil sciences, and advance our understanding of root growth in heterogeneous structured soils

Carmen

De cada obra s'ha digitalitzat un programa sencer. De la resta s'han digitalitzat les parts que són diferents.Empresa Juan A. PamiasÒpera de Georges Bizet i llibret de Meilhac i Halév

Carmen

De cada obra s'ha digitalitzat un programa sencer. De la resta s'han digitalitzat les parts que són diferents.Empresa Juan A. PamiasÒpera de Georges Bizet amb llibret de Henri Meilhac i Ludovic Halév

Los Pescadores de Perlas

De cada obra s'ha digitalitzat un programa sencer. De la resta s'han digitalitzat les parts que són diferents.Empresa Juan A. PamiasÒpera de Georges Bizet amb llibret de Michel Carré i Eugène Cormo

Testing Swampland Conjectures with Machine Learning

We consider Type IIB compactifications on an isotropic torus $T^6$ threaded by geometric and non geometric fluxes. For this particular setup we apply supervised machine learning techniques, namely an artificial neural network coupled to a genetic algorithm, in order to obtain more than sixty thousand flux configurations yielding to a scalar potential with at least one critical point. We observe that both stable AdS vacua with large moduli masses and small vacuum energy as well as unstable dS vacua with small tachyonic mass and large energy are absent, in accordance to the Refined de Sitter Conjecture. Moreover, by considering a hierarchy among fluxes, we observe that perturbative solutions with small values for the vacuum energy and moduli masses are favored, as well as scenarios in which the lightest modulus mass is much greater than the corresponding AdS vacuum scale. Finally we apply some results on Random Matrix Theory to conclude that the most probable mass spectrum derived from this string setup is that satisfying the Refined de Sitter and AdS scale conjectures.Comment: 30 pages, 14 Figures. (v2) References adde